(2008•海淀区二模)如果实数x,y满足x−1+y2−4y+4=0,那么xy的值等于( )
如果实数x,y满足||x-1|+(x+y)²=0那么xy的值等于
如果实数x y 满足x2+y2=1,那么(1-xy)(1+xy)的最小值和最大值
已知实数x,y满足x2+y2-xy+x-1/2y+1/4=0 试求x,y的值
(2012•温州二模)已知实数满足y−x+2≥0x2+y2≤4,则y-3x的取值范围是( )
已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值
已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值
已知实数满足x2+y2=4,那么3y-4x的最大值为( )
已知实数xy满足x2+y2-4x+3=0则(x+y-3)/(x-y+1)的取值范围是
如果实数x,y满足x2+y2=1,则(1+xy)(1-xy)有( )
实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值
已知实数x,y满足x2+4xy+4y2-x-2y+14=0,则x+2y的值为 ___ .
已知实数x、y满足x2 4xy 4y2 x 2y-6=0,求6/x 2y的值